Cruise Altitude Abbreviations

Hi IFC,

Lately I have seen an increase in the number of people who don’t understand the cruise altitude abbreviations.

E.g

People thinking 7000ft is FL007
People thinking 10000ft is FL010
People thinking 37000ft is FL037

This is wrong!


Correct Abbreviations:

1000ft: FL010
5000ft: FL050
9000ft: FL090
13000ft: FL130
17000ft: FL170
26000ft: FL260
34000ft: FL340
39000ft: FL390
42000ft: FL420

Hope this clears up any confusion!
Happy Landings!

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Yes flight levels worth in hundreds of feet, so you simply remove 2 zeroes from the end of your height!

Using @BennyBoy examples above, ensure you stick to a 3 digit Flight Level by putting zeroes infront of your height if required!

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To add a technical point, according to the FAA, FL abbreviations are only used above FL180 in class A airspace. Below FL180 you use the standard altitude, e.g. 17000ft. Within IF we follow FAA regulations so you’ll hear ATC calling out full altitudes when you’re below FL180.

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Nice!

So for those ‘flying to the moon’ people & topics doing 90,000 feet, you need to be at FL12610000000 😉🌙

Fortunately, we are not all American haha

Transition altitudes are different around the world.

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